Archive
Correspondence
Incoming mail (1973)
Letter
Letter
about personal problems and possible visit to Novosibirsk; about thesis defending; about current scientific matters.
Date: 25.07.1973
Original document language: russian
Authors: Yuri A. Pervin
Persons: Alexei A. Lyapunov, Vadim E. Kotov, Ekaterina Logvinovna Yuschenko
Addressee: Andrei Petrovich Ershov

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